Token Ring Vlans; Vlan Configuration Guidelines; Default Vlan Configuration - Cisco Catalyst 2950 Software Manual

VLANs in the VTP Database
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The
each VLAN media type.

Token Ring VLANs

Although the Catalyst 2950 switches do not support Token Ring connections, a remote device such as a
Catalyst 5000 series switch with Token Ring connections could be managed from one of the supported
switches. Switches running this IOS release advertise information about these Token Ring VLANs when
running VTP version 2:
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For more information on configuring Token Ring VLANs, refer to the Catalyst 5000 Series Software
Configuration Guide.

VLAN Configuration Guidelines

Follow these guidelines when creating and modifying VLANs in your network:
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Note
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Default VLAN Configuration

Table 8-6
Note Catalyst 2950 switches support Ethernet interfaces exclusively. Because FDDI and Token Ring VLANs
are not locally supported, you configure FDDI and Token Ring media-specific characteristics only for
VTP global advertisements to other switches.
Catalyst 2950 Desktop Switch Software Configuration Guide
8-16
Security Association Identifier (SAID)
Bridge identification number for TRBRF VLANs
Ring number for FDDI and TRCRF VLANs
Parent VLAN number for TRCRF VLANs
STP type for TRCRF VLANs
VLAN number to use when translating from one VLAN type to another
"Default VLAN Configuration" section on page 8-16
Token Ring TRBRF VLANs
Token Ring TRCRF VLANs
A maximum of 250 VLANs can be active on supported switches. If VTP reports that there are 254
active VLANs, 4 of the active VLANs (1002 to 1005) are reserved for Token Ring and FDDI.
The Catalyst 2950-12 and Catalyst 2950-24 switches support only 64 port-based VLANs.
Before you can create a VLAN, the switch must be in VTP server mode or VTP transparent mode.
For information on configuring VTP, see the
Switches running this IOS release do not support Token Ring or FDDI media. The switch does not
forward FDDI, FDDI-Net, TRCRF, or TRBRF traffic, but it does propagate the VLAN configuration
through VTP.
shows the default configuration for the Ethernet VLAN default and ranges.
lists the default values and possible ranges for
"Configuring VTP" section on page
Chapter 8 Configuring VLANs
8-12.
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